Method, apparatus and system for determining effects and optimizing parameters of vagus nerve stimulation

• US 20050177200A1
• Filed: 05/05/2003
• Published: 08/11/2005
• Est. Priority Date: 05/03/2002
• Status: Abandoned Application

• Current Assignee: Daryl E. Bohning, Mark S. George, Ziad Nahas
• Original Assignee: Daryl E. Bohning, Mark S. George, Ziad Nahas
• Inventors: Nahas, Ziad, George, Mark S, Bohning, Daryl E.
• Application Number:
  US10/513,168
• Publication Number:
  US 20050177200A1
• Time in Patent Office: Days
• US Class Current: 607/45
• CPC Class Codes: A61N 1/36014 External stimulators, e.g. with patch electrodes external pacemakers A61N1/3625
• CPC Class Codes: G01R 33/4806 Functional imaging of brain activation

Abstract

Effects of vagus nerve stimulation (VNS) on, for example, regions of the brain, are determined by synchronizing application of the VNS with functional magnetic resolution imaging (fMRI) scanning (FIG. 1). Parameters of the VNS application may be optimized using the fMRI images. Optimal dosage and protocols for the VNS application may be set based on the determined effects of VNS application on regional brain activity. Also, a blood oxygenation level-dependent (BOLD) response of one or more brain regions to VNS application may be determined based on the fMRI images. VNS may also be used to treat neuropsychiatric diseases by mapping effects or VNS application on brain regions u) regional effects or the neuropsychiatric disease. The change in effects of VNS application on the patient with continued use may be assessed based on long-term and repeated studies of effects of VNS application.

Claims

1. A method for determining the effects of vagus nerve stimulation, comprising:

detecting electrical impulses applied to stimulate the vagus nerve of a patient; and

synchronizing operation of a functional magnetic resolution image (FMRI) scanner with the detected electrical impulses, wherein images produced by the fMRI scanner indicate effects of applying vagus nerve stimulation (VNS) on the patient.

2. The method of claim 1, further comprising performing scanning by the fMRI scanner in synchronization with application of VNS.

3. The method of claim 1, further comprising using the images produced by the fMRI scanner to determine effects of VNS application on regional brain activity.

4. The method of claim 3, further comprising setting optimal dosage and protocols for VNS application based on the determined effects of VNS application on regional brain activity.

5. The method of claim 1, further comprising determining a blood oxygenation level-dependent (BOLD) response of one or more brain regions to VNS application based on the images produced by the fMRI scanner.

6. The method of claim 3, wherein the images are used to determine the effects of VNS application on at least one of the orbitofrontal cortex, parieto-occipital cortex, left temporal cortex, hypothalamus, and left amygdala regions of the brain.

7. The method of claim 1, further comprising using VNS application to treat at least one neuropsychiatric disease, based on the determined effects of VNS application.

8. The method of claim 7, wherein the step of using VNS application to treat the neuropsychiatric disease comprises mapping effects of VNS application on brain regions to regional effects of the neuropsychiatric disease.

9. The method of claim 1, further comprising optimizing application of the VNS based on the fMRI images generated by the scanner.

10. The method of claim 9, wherein the step of optimizing includes optimizing at least one of intensity, frequency pulse width, and duration of the electrical impulses based on the fMRI images.

11. The method of claim 1, further comprising assessing whether of effects of VNS application on the patient change with continued use based on long-term and repeated studies of effects of VNS application.

12. An apparatus for determining the effects of vagus nerve stimulation, comprising:

means for detecting electrical impulses applied to stimulate the vagus nerve of a patient; and

means for synchronizing operation of a functional magnetic resolution image (fMRl) scanner with the detected electrical impulses, wherein images produced by the fMRI scanner indicate effects of vagus nerve stimulation (VNS) on the patient.

13. The apparatus of claim 12, wherein scanning is performed by the fMRI scanner in synchronization with application of VNS.

14. The apparatus of claim 12, wherein the images produced by the FMRI scanner are used to determine effects of VNS application on regional brain activity.

15. The apparatus of claim 14, wherein optimal dosage and protocols for VNS application are set based on the determined effects of VNS application on regional brain activity.

16. The apparatus of claim 12, wherein a blood oxygenation level-dependent (BOLD) response of one or more brain regions to VNS application is determined based on the images produced by the fMRI scanner.

17. The apparatus of claim 14, wherein the images are used to determine the effects of VNS on at least one of the orbitofrontal cortex, parieto-occipital cortex, left temporal cortex, hypothalamus, and left amygdala regions of the brain.

18. The apparatus of claim 12, wherein VNS application is used to treat at least one neuropsychiatric disease, based on the determined effects of VNS application.

19. The apparatus of claim 18, wherein VNS application is used to treat the neuropsychiatric disease by mapping effects of VNS on brain regions to regional effects of the neuropsychiatric disease.

20. The apparatus of claim 12, wherein application of the VNS is optimized based on the fMRI images generated by the scanner.

21. The apparatus of claim 12, wherein at least one of intensity, frequency, pulse, width and duration of the applied electrical impulses to stimulate the vagus nerve is optimized based on the fMRI images.

22. The apparatus of claim 12, wherein a change in the effects of VNS application on the patient is assessed based on long-term and repeated studies of effects of VNS application.

23. A system for determining the effects of vagus nerve stimulation, comprising:

a generator for generating electrical impulses and applying the impulses to stimulate the vagus nerve of a patient;

a functional magnetic resolution image (FMRI) scanner for producing a magnetic image of the patient; and

a processor for synchronizing operation of the fMRI scanner with the detected electrical impulses such that images produced by the fMRI scanner indicate effects of application of vagus nerve stimulation (VNS) on the patient.

24. The system of claim 23, wherein the fMRI scanner produces magnetic images of the patient in synchronization with application of VNS.

25. The system of claim 23, wherein the images produced by the FMRI scanner are used to determine effects of VNS application on regional brain activity.

26. The system of claim 25, wherein optimal dosage and protocols for VNS application are set based on the determined effects of VNS application on regional brain activity.

27. The system of claim 23, wherein a blood oxygenation level-dependent (BOLD) response of one or more brain regions to VNS application is determined based on the images produced by the fMRI scanner.

28. The system of claim 25, wherein the images are used to determine the effects of VNS application on at least one of the orbitofrontal cortex, parieto-occipital cortex, left temporal cortex, hypothalamus, and left amygdala regions of the brain.

29. The system of claim 23, wherein VNS application is used to treat at least one neuropsychiatric disease, based on the determined effects of VNS application.

30. The system of claim 29, wherein VNS application is used to treat the neuropsychiatric disease by mapping effects of VNS on brain regions to regional effects of the neuropsychiatric disease.

31. The system of claim 23, wherein application of VNS is optimized based on the fMRI images produced by the scanner.

32. The system of claim 31, wherein at least one of intensity, frequency, pulse width and duration of the electrical impulses applied to stimulate the vagus nerve are optimized based on the fMRI images.

33. The system of claim 23, wherein a change of effects of VNS on the patient with continued use is assessed based on long-term and repeated studies of effects of VNS.